Pump.



E. W. CLARK.

PUMP. APPLIOATIN FILED JUNE 14, 1909.

Pmluted Aug. 16, 1910.

together hy the intermediate coupling 4i.,

the liquid iepunipod to the top ofithe Well.

notitie.

`specifinition of Letters reim.

'Patenten iiug. Iie, ieia ppication filed June 14, 1909. Serial No.502,067.

To all whom it may eoiecem;

.le it 'known'that I, EDWIN YV. CLAmiTa cit izen ot' the United States,residing,r at Chicago, in the ecuinty oiiCookand State of Illinoi'e,havei,"invented a certain new and nset'ul Improvement in Pumps, of whichthe`l `following is a specification. j y

My invention lrelates to pumpe and is especially adapted for deep Wells,partieularly those where a well casing is employed. ln its mostadvantageous forni, iny pump double acting, and I have seleoted thisform to illustrate the invention. v

The general vobject ol' the invention. is to obtain a puinp which shallhe durable, Simple in construction and eil'ieient in act-ion.

Home oit thel .specific objects ofthe invention are: iirst, to provide apump of this general character in which the llow `wilLfhe continuous;second, to providela pump` in which the otwration` shall be positive,the l` parts4 operating` toaetually force the liquid instead ot'depending upon atmospheric pressure as in the `oase ota puinp acting``upon the vacuum principle; third, to provide a construction suchthattheacting parte may he withdrawn by. merely raising the pump rodwithout removing the cylinder from the well easing; `fourth, `to providea construction in which the stationary parte Within the'cylinder may heseated hy merely lowering them after the cylinder ie in position `in thewell; and iiitth, to .provide certain details of constructionhereinafter more fully Specified. y

l. obtain. my ohjeets hy `the mechanism` illustrated in theiuzeonipnnyii1g,drawings, in which y Figure l isa centralvertical'section ofa pump embodying my invention and shown in positionina Well easing. Edge. Q, 3, i, 5i and (3 are trani-svolse seetionalviews taken reei'iurtively on the lines Iti,` iw-u and (in-( of Fig. l.v

t'w'imihir numei'uls refer to similar parts throughout the severalviewsa h y'ilic parte oit the pump proper areA eon-` tained within theVwelll casing l. which ie usually circuler in AGroen `si-:rtion and `ei:-tends from top,tolmttim of the Weil. `With` in the wel] easing are theupper and lower cylinders 2 and 3 which are Connected The upper cylinderis attachedto and coininunioetes 4with the pipe 5 fthroughivhieh 'Thelower cylinder 3 tei'n'iinateeatthehot `part l1 having the 14 forpreventiiw the' pipe .i5 to toni in the bottom coupling 6 whichapertured to permit liquid to pass vup through "itl Said bottomcoupling',- is provided With a check valve, orpreventing the downwardpassage 'of liquid. through it, and in the preferred .construction saidcheck consists ofa vertically apertured seat. operate with the cheek`valve valve is preferahlyrzi hall by means of a. cage 9 or vice. `Inorder come to a hearing automatically and there.-

S." Said cheek and is held captive after "he iirinly held in position,it and. the` are correspondingly bottom coupling 6 tapered to fit eachother as shown. `The cage 9 `is screw threaded near the that it and thevalve seat and Valve inay` he withdrawn fromV the well when desiredmeans ofthe correspondingly threaded part 24 hereinafter mentioned. V

o The intermediate the outside `of the cylinders 2 and 3 to `theinsidethereof. At a point alcovel said aperf tures said coupling has anannular 'tapered adapted to co other euta'ble de*` that the valve seat 7`in av top in `gorder coupling t `allieve` nien#` tioned is yprovided`with lateral apertures Q?. through which the liquid may pass from`surface 10 which converges doivniiiardly and i.

forms a eeet for the correspondingly ta# pered valve seat which in thepresent in- Stance `is formed of taper and the party 1.2 beingvertically apertured and threaded `for `screwing into the part ll `toforni `a support for the check valve i3. In tho. design shown, the part1l is provided with an arch grcata distance from ite seat. .x

The `parte l2, 1.3 and le areoentrally apertnred in a if'ertioeidirection to receive the center pipe `l5 which is verticallj7 ino'vahieand' carries the tipi` i `and lower plungers. 'lthough the.constructionof these pluiigere may healtered Without departing' iroin the spirit ofthe invei'ition, the form iiliietrated vis edvantageous, the upperplunger consieti i ingiof a plurality ofinetallie disks 18,18 `screwingonto `the upper portion of the eenhetiveen themwash- '.lfhe parte .18andltl `at pointe` outsideiol".y permit upward iioii oil:l liquid..

'ter pipe .l5 and carrying ere or cup leathers 19. are `wrtieallfyaportar-ed Ai voire `2O ieaidaipted to seat upon'the top ofthe yupper`plunger `to prevent liquid .from "passing downward through. it. Saidvaive isi-capable ot rising; a limited distance oiiiite feeat ivlientheliquid 1praises upward upon it two parts Ill and 12the` from beneath, asindicated in dotted lines, Fig. 1. The upward movement of the checkvalve 20 is limited by means of the stop or collar 21 which screws uponthe center pipe 15 although any other suitable means may be employeoh Bypreference a sleeve 22 is screwed onto pipe 15 between-the collar 21 andupper section 18 of the upper plunger and thus -constitutes a. distancepiece for holding the parts 18 and 21 in relative position and serves asa' guide for the check valve 20.

The lower plunger in its preferred form consists of a, verticallyapertured valve seat 24 having an inner flange 25 near the' bottomadapted to support the' disk 26 and washers or cup leathers 27. Saiddisk and washers are Vheld down by means of a part 28 which screws ontothe upper partof the valve seat 2,4 and serves to reciprocate the latterup and down within the cylinder 3. Said part ,28 connects at the.topvwith the Vbottom of the center pipe 15 and is secured theretopreferably by s'crewthreads and a pin 29.

Part 28 is imperforate at the sides so that liquid cannot escape.-rexcept through the pipe 15. It islso formed as to hold the ball 30captive sothat the latterwill seat upon the valve seat 24 and preventdownw'ard passage of li uid. It will be noted that in this preferredform the parts numbered 24 to4 30 inclusively constitute a combinedvlower plunger and check valve operating in the cylinder beneath' thestationary check valves, 11,12 and 13. Part 24 is threaded at its lowerend to engage the threaded upper portion of the part 9, so that all ofthe loose or removable parts may be withdrawn from the, cylinder throughthe agency of the piston rod 15.

p Pipe 15 is attached to and communicates with the lower end of a pipe32 which is v laterali apertured to permit the escape of liquid romtheinside of said pipe out into the discharge pipe .5 at a point abovethe upper plunger. secured touand to be vertically lreciprocated by thepump rod (not shown) which eX- tends upward to the top of the well andconnects to the source of power.

In operation, when the parts are in their lowermost o`sition the valves8, 13,- 20 and 30 will be own upon their respective-seats. As soon asthe pipe 32 and lparts connected thereto commence to rise, the weight ofthe liquid outside in the well casing, assisted by the suction of thelower plunger causes the valve Sto rise and admit liquid into the lowercylinder beneath the lower plunger;

at the Sametime the wei ht of liquid andl suction of the upper p ungerAcause the' yvalve 13 to rise and admit liquid into.' the upper cylinder2 beneath the upper plunger, the liquid entering through the apertures 9and the vertically faperturcd part 12. Thus Pipe 32 is adapted to belthe upper and lower cylinders are both tilled with liquid beneath therespective plungers. During the upward movement of. the parts As soon asthe parts have reached their highest position and commenced to descend,the valves 8 and 13 will become seated and prevent the downward escapeof liquid from the upper and lower cylinders. The liquid confined abovethe bottom check valve 8 and center check valve 13 causes the valves 30and 20 respectively to rise from their seats and permit the upwardpassage of liquid through the lower and u per plungers respectively. Thedownward) movement of the upper plunger produces no effect upon thelevel of the water in the discharge pipe 5, but the downward movement ofthe lower plunger causes the liquid confined beneath it to be forcedupward through the valve seat 24, center pipe 15 and outward through thelateral apertures in the pipe 32. This quantity of liquid emerging fromthe pi e 32, being added to the amount of liquid alieady containedwithin the discharge pipe 5, and prevented from escaping downwardtherefrom by the check valve 13, causes an up ward iiow of water in thedischarge pi. e 5.

Hence there is a pumping action upon oth the upward and downward strokeand the pump 'is doublev acting.

It will be understood that under the ordinary practical conditions inpumpin water or oil from a well, the washers .an other frictional partsare subjected to great wear and it becomes desirable to frequently renewthem. In a pump of myV construction the removal ofthe reciprocatingparts is accomplished in a very simple manner, for all that is necessaryis to pull up the pump rod and pipe 32 and raise the parts to the top ofthe Well, the lower `plunger striking the seat ofthe center check valve13 and lifting it from its tapered or conical support 4. rfhe merelifting of the pump rod therefore is all that is necessary to withdrawboth plungers and all of the valves and valve seats except the bottomone, which may be afterward removed by means of a suitable tool asherein4 previously sug rested. Conversely, the parts may be adjustedwhile Ithe cylinders remain at vthe bottom offthe well by merelylowering them into place, the weight of the parts causing the properseating of the tapered members. Although renewals arethus easily madeina pump of my construction such renewals need not be made with s uchfrequency as is required in a pump wherel the vacuum, principle is emloyed, in part or in whole, and where lea 'y valves would destroy thenecessary 'vacuunn ln my pump the action is positive and the liquid lll' to seat upon said is atl all times positively1 forced in the propel'direction.`

Although the upper and lower cylinder 2 and 3 and intermediate coupling4 are here shown and described as separable pieces, they may if desiredbe made in a single piece. Iiurthermore the upper and lower plungers maybe constructed with a greateror less number of disks and washers thanare illustrated.

It will be noted that in my pump there is an opening `at the lower endof the cylinder through the bottom check valve; As a result sand andgravel cannot collect here. It will be noted that in my pump in caseeither oneof the plungers should become out of order the other will bepermitted to operate in the regular manner. Hence the pump will operateto a limited extent even it one-or the other of the plungers fails tooperate. i

lrlaving thus described my invention, what I claim as new, and tersPatent, is: l

l. In a pump, the combination of a cylinder, two ditl'erent plungerstherein arranged one above the other, the upper plunger being of largerdiameter than the lower and the upper portion of the cylinder where theupper plunger is located being ot' greater diameter than `the lowerwhere the lower plunger is located, and suitable check valves associatedwith said plungers, one of said valves being located between saidplungers and having a taper lseat whereby itmay be lifted from its seatby the lower plunger.

Q. In a pump, a cylinder which is of larger diameter at its upperportion than at its lower portion,`a taper valve seat at the j unetionof the smaller and larger portions pi said cylinder, a piston rod, twoplungers secured to said rod, one being located in the smaller and theother in the larger portion of said, cylinder, and suitable checkvalves, one of which is adapted taper valve 'scat whereby it and saidplungers may be withdrawn from the cylinder by withdrawing said pisf lton rod.

` plungers secured to said lcated in the smaller and desire to secure byLeti portion ,a check valve upon each of said plungers, another cheekvalve beneath the lowest plunger and a fourth check valve seated uponthe aforesaid taper seat.

at. .In a pump cylinder which is of larger diameter at its upper portion`than at its lower portion, a taper valve seat at the junction oi'the'slnaller and larger portions of said cylinder, a pump rod, twoplungers secured to said rod, one beinglocated in the smaller andtheother in the larger portion of each cylinder, a check valve upon each ofsaid plungers, another check 'alve beneath thelowest plunger and afourth check valve being a lateral opening in the cylinder beneath saidtaper th'e purpose described.v j

5. in a pump, in eonibinatiou,

seated upon the aforesaid taper seat, there side of the' valve seatfor acylinder which is of larger diameter at its upper portion than at itslower p'ort1on, a, taper valve seat at the junction of' the larger andvsmaller portions of the cylinder, a hollow -bottom check valve forwithdrawing it.

6. In a pump, in combination, acylinder which is o larger diameter atits upper portion than at its lower portion, a taper valve seat at thejunction of the larger and smaller portions o the cylinder, saidcylinder having openings in its side at said junction, a hollow pistonrod, two plun,f: ;ersv secured to said rod, one in the larger and one inthe smaller portion oi' said cylinder,

carried by each of said plungers, another check valve seated in saidtaper seat, a taper seat in the smaller portion ofthe cylinder plunger,and a bottom check valve in the last mentioned seat, said lower plungerbeing adapted to screw onto said bottom check valve for withdrawing it.

In witness whereof, I have hereunto sub-f scribed my name in thepresence of two witnesses. i

I EDWIN W. CLARK.

lVitnesses:

HOWARD M. Cox, C. J. ClRIs'roIgrnL.

